If possible, maybe sudden death should force everyone to be the same class or two classes. I like the idea of melee only sudden death, but some classes are severly gimped in their movement speed. So maybe if it randomly picked a class, changed everyone to it, and was melee only it'd work.
As it is right now, I just change class to scout in sudden death and I run circles around everyone who stays soldier, heavy, etc. That said, I personally really like the sudden death reform, and it certainly solves those extremely boring stalemates that last the entire 3 minutes.